Hey guys, I have a 12.5 Briggs that stopped running. Halfway through the yard it just died, I checked fuel, spark and air they all seem to be working yet all I can get is a backfire. I replaced the plug and drained the bowl even poured some gas straight into the carb. nothing but a backfire. If it was a car I would think the timing belt had jumped. Is a Briggs is direct drive valve train. any suggestions. Thanks, Rob
OT: 12.5 Briggs
Aug 05, 2006
Last reply: 19 years ago
5 Replies
I would see if the flywheel key is sheared.
Exactly.
CJB
The key is made to shear when you hit a rock to keep from breaking the crankshaft. Make sure you replace it with the correct part.
Al
Thanks, I did. OEM key. Strange thing is that I was in my driveway with the blades off when it sheared. All is well now.
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